CVE-2020-1147

HIGH7.8

CISA KEV

Published 2020-07-14 · Updated 2026-06-17 · Source secure@microsoft.com

Summary

CVE-2020-1147 is a high-severity (CVSS 7.8) vulnerability in Microsoft .NET Framework, SharePoint, Visual Studio. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 3, 2022. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

All 390 known-exploited Microsoft vulnerabilities →

Description

A remote code execution vulnerability exists in .NET Framework, Microsoft SharePoint, and Visual Studio when the software fails to check the source markup of XML file input, aka '.NET Framework, SharePoint Server, and Visual Studio Remote Code Execution Vulnerability'.

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA Known-Exploited Vulnerability

Product: Microsoft — .NET Framework, SharePoint, Visual Studio

Name: Microsoft .NET Framework, SharePoint, and Visual Studio Remote Code Execution Vulnerability

Date added: 2021-11-03 · Due: 2022-05-03

Required action: Apply updates per vendor instructions.

References

View on NVD

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